Magnetic and mechanical effects of Mn substitutions in AlFe 2 B 2
Journal article, 2019

The mechanical and magnetic properties of the newly discovered MAB-phase class of materials based upon AlFe 2 B 2 were investigated. The samples were synthesised from stoichiometric amounts of all constituent elements. X-ray diffraction shows that the main phase is orthorhombic with an elongated b-axis, similar to AlFe 2 B 2 . The low hardness and visual inspection of the samples after deformation indicate that these compounds are deformed via a delamination process. When substituting iron in AlFe 2 B 2 with manganese, the magnetism in the system goes from being ferro- to antiferromagnetic via a disordered ferrimagnetic phase exhibited by AlFeMnB 2 . Density functional theory calculations indicate a weakening of the magnetic interactions among the transitions metal ions as iron is substituted by manganese in AlFe 2 B 2 . The Mn-Mn exchange interactions in AlMn 2 B 2 are found to be very small.


X-ray diffraction

Density functional theory

Magnetocaloric materials

Mechanical properties


J. Cedervall

Uppsala University

Martin Andersson

Uppsala University

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Diana Iuşan

Uppsala University

Erna K. Delczeg-Czirjak

Uppsala University

U. Jansson

Uppsala University

P. Nordblad

Uppsala University

M. Sahlberg

Uppsala University

Journal of Magnetism and Magnetic Materials

0304-8853 (ISSN)

Vol. 482 54-60

Subject Categories

Inorganic Chemistry

Materials Chemistry

Condensed Matter Physics



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